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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var name="lucy"
        var age=20
        //在info里面对name和age操作,字符串插入变量和表达式。变量名写在 ${} 中，${} 中可以放入 JavaScript 表达式。
        var info=`My Name is ${name},I am ${age+1} years old next year.`
        console.log(info)
    </script>
</body>
</html>